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CheckTown

Address Validator

Verify any address — paste a full address and we'll look it up in OpenStreetMap to check each component. Free, no account needed.

Enter a full address above to start validation

We look up the address in OpenStreetMap and verify street, city, and country

What we check

Input Format

Checking that the input looks like an address

Geocoding

Looking up the address in OpenStreetMap

Street Detection

Checking that a street name was identified

City Detection

Checking that a city or locality was identified

Country Detection

Checking that a country was identified

Learn More

Address Validation: Ensure Accurate Postal Data Every Time

Invalid addresses cause failed deliveries and data quality issues. Learn how to validate postal data.

What Is Address Validation?

Address validation is the process of verifying that a postal address is real, correctly formatted, and deliverable. It checks structure, completeness, and optionally looks up the address against official postal databases to confirm it exists.

5 min readRead full guide